7.8 High
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
7.2 High
AI Score
Confidence
High
4.6 Medium
CVSS2
Access Vector
LOCAL
Access Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:L/AC:L/Au:N/C:P/I:P/A:P
0.001 Low
EPSS
Percentile
33.2%
This updated advisory is a follow-up to the original advisory titled ICSA-22-132-05 Siemens Industrial PCs and CNC devices that was published May 12, 2022, on the ICS webpage on cisa.gov/ICS
Successful exploitation of these vulnerabilities may allow an authenticated user to enable escalation of privilege via local access.
Siemens reports these vulnerabilities affect the following Industrial PCs and CNC devices:
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Improper input validation in BIOS firmware for some Intel processors may allow an authenticated user to potentially enable escalation of privilege via local access.
CVE-2020-0590 has been assigned to this vulnerability. A CVSS v3 base score of 7.8 has been calculated; the CVSS vector string is (AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H).
Insufficient access control in the Linux kernel driver for some Intel processors may allow an authenticated user to potentially enable information disclosure via local access.
CVE-2020-8694 has been assigned to this vulnerability. A CVSS v3 base score of 5.6 has been calculated; the CVSS vector string is (AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N).
Improper isolation of shared resources in some Intel processors may allow an authenticated user to potentially enable information disclosure via local access.
CVE-2020-8698 has been assigned to this vulnerability. A CVSS v3 base score of 5.5 has been calculated; the CVSS vector string is (AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N).
Insufficient control flow management in subsystem for Intel® CSME versions before 11.8.80, 11.12.80, 11.22.80, 12.0.70, 13.0.40, 13.30.10, 14.0.45 and 14.5.25, Intel® TXE versions before 3.1.80 and 4.0.30 may allow an unauthenticated user to potentially enable escalation of privilege via physical access.
CVE-2020-8745 has been assigned to this vulnerability. A CVSS v3 base score of 6.8 has been calculated; the CVSS vector string is (AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H).
Siemen reported these vulnerabilities to CISA.
Siemens has released updates for several affected products and is currently working on BIOS updates that include chipset microcode updates for further products.
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Siemens has identified the following specific workarounds and mitigations users can apply to reduce risk:
As a general security measure, Siemens recommends protecting network access to devices with appropriate mechanisms. To operate the devices in a protected IT environment, Siemens recommends configuring the environment according to Siemens’ operational guidelines for industrial security and following recommendations in the product manuals.
Additional information on industrial security by Siemens can be found on the Siemens industrial security webpage.
For more information see Siemens Security Advisory SSA-678983
CISA recommends users take defensive measures to minimize the risk of exploitation of this vulnerability. CISA reminds organizations to perform proper impact analysis and risk assessment prior to deploying defensive measures.
CISA also provides a section for control systems security recommended practices on the ICS webpage on cisa.gov Several recommended practices are available for reading and download, including Improving Industrial Control Systems Cybersecurity with Defense-in-Depth Strategies.
Additional mitigation guidance and recommended practices are publicly available on the ICS webpage on cisa.gov in the Technical Information Paper, ICS-TIP-12-146-01B–Targeted Cyber Intrusion Detection and Mitigation Strategies.
Organizations observing any suspected malicious activity should follow their established internal procedures and report their findings to CISA for tracking and correlation against other incidents.
No known public exploits specifically target these vulnerabilities. These vulnerabilities are not exploitable remotely.
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2020-0590
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2020-8694
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2020-8698
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2020-8745
cert-portal.siemens.com/productcert/pdf/ssa-678983.pdf
cisa.gov/ics
cisa.gov/ics
cwe.mitre.org/data/definitions/1189.html
cwe.mitre.org/data/definitions/20.html
cwe.mitre.org/data/definitions/269.html
cwe.mitre.org/data/definitions/287.html
public.govdelivery.com/accounts/USDHSCISA/subscriber/new?topic_id=USDHSCISA_138
support.industry.siemens.com/cs/ww/en/view/109743969/
support.industry.siemens.com/cs/ww/en/view/109763408
support.industry.siemens.com/cs/ww/en/view/109763408
support.industry.siemens.com/cs/ww/en/view/109763408
support.industry.siemens.com/cs/ww/en/view/109763408
support.industry.siemens.com/cs/ww/en/view/109763408
support.industry.siemens.com/cs/ww/en/view/109763408
support.industry.siemens.com/cs/ww/en/view/109763408
support.industry.siemens.com/cs/ww/en/view/109763408
support.industry.siemens.com/cs/ww/en/view/109763408
support.industry.siemens.com/cs/ww/en/view/109763408
support.industry.siemens.com/cs/ww/en/view/109763408
support.industry.siemens.com/cs/ww/en/view/109763408
support.industry.siemens.com/cs/ww/en/view/109763408
twitter.com/CISAgov
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www.cisa.gov/uscert/ics/recommended-practices
www.cisa.gov/uscert/ics/tips/ICS-TIP-12-146-01B
www.cisa.gov/uscert/sites/default/files/recommended_practices/NCCIC_ICS-CERT_Defense_in_Depth_2016_S508C.pdf
www.dhs.gov
www.dhs.gov/foia
www.dhs.gov/performance-financial-reports
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www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N/E:P/RL:O/RC:C
www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C
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www.oig.dhs.gov/
www.siemens.com/cert/operational-guidelines-industrial-security
www.siemens.com/industrialsecurity
www.siemens.com/industrialsecurity
www.surveymonkey.com/r/CISA-cyber-survey?product=https://www.cisa.gov/news-events/ics-advisories/icsa-22-132-05
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7.8 High
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
7.2 High
AI Score
Confidence
High
4.6 Medium
CVSS2
Access Vector
LOCAL
Access Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:L/AC:L/Au:N/C:P/I:P/A:P
0.001 Low
EPSS
Percentile
33.2%